Method findCheaperReplacements

service/price.py:200–229

(self, items, callback, fetchTimeout=10)

        db.clearPrices()

    def findCheaperReplacements(self, items, callback, fetchTimeout=10):
        sMkt = Market.getInstance()

        replacementsAll = {}  # All possible item replacements
        for item in items:
            if item in replacementsAll:
                continue
            itemRepls = sMkt.getReplacements(item)
            if itemRepls:
                replacementsAll[item] = itemRepls
        itemsToFetch = {i for i in chain(replacementsAll.keys(), *replacementsAll.values())}

        def makeCheapMapCb(requests):
            # Decide what we are going to replace
            replacementsCheaper = {}  # Items which should be replaced
            for replacee, replacers in replacementsAll.items():
                replacer = min(replacers, key=lambda i: i.price.price or math.inf)
                if (replacer.price.price or math.inf) < (replacee.price.price or math.inf):
                    replacementsCheaper[replacee] = replacer
            try:
                callback(replacementsCheaper)
            except (KeyboardInterrupt, SystemExit):
                raise
            except Exception as e:
                pyfalog.critical("Execution of callback from findCheaperReplacements failed.")
                pyfalog.critical(e)

        # Prices older than 2 hours have to be refetched
        validityOverride = 2 * 60 * 60
        self.getPrices(itemsToFetch, makeCheapMapCb, fetchTimeout=fetchTimeout, validityOverride=validityOverride)